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A030263
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Number of nonisomorphic commutative groupoids with 1 idempotent.
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2
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1, 2, 57, 18544, 104208775, 12244640803344, 36193798266945468968, 3160642595226430678271332032, 9374102814860736866561050257041372709, 1067627008939949742128760399369846160513647927040
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn,nice
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AUTHOR
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STATUS
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approved
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